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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A211682 Prime numbers such that all the substrings of length <= 2 are primes.

Table of values

n a(n)
1 2
2 3
3 5
4 7
5 23
6 37
7 53
8 73
9 373
10 237373
11 537373
12 5373737
13 53737373
14 53737373737
15 237373737373
16 737373737373737
17 53737373737373737
18 373737373737373737373
19 53737373737373737373737
20 53737373737373737373737373
21 373737373737373737373737373
22 5373737373737373737373737373737

List of values

[2, 3, 5, 7, 23, 37, 53, 73, 373, 237373, 537373, 5373737, 53737373, 53737373737, 237373737373, 737373737373737, 53737373737373737, 373737373737373737373, 53737373737373737373737, 53737373737373737373737373, 373737373737373737373737373, 5373737373737373737373737373737]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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